const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : '0' + n
}

const videoType = [
  'mp4', 'mov', 'avi', 'rmvb', 'flv', '3gp', 
  'MP4', 'MOV', 'AVI', 'RMVB', 'FLV', '3GP'
]
const imageType = ['jpg', 'png', 'jpeg', 'gif']

const getYMDHMS = timestamp => {
  let time = new Date(timestamp)
  let year = time.getFullYear()
  let month = time.getMonth() + 1
  let date = time.getDate()
  let hours = time.getHours()
  let minute = time.getMinutes()
  let second = time.getSeconds()

  if (month < 10) { month = '0' + month }
  if (date < 10) { date = '0' + date }
  if (hours < 10) { hours = '0' + hours }
  if (minute < 10) { minute = '0' + minute }
  if (second < 10) { second = '0' + second }
  return year + '-' + month + '-' + date + ' ' + hours + ':' + minute + ':' + second
}

module.exports = {
  formatTime: formatTime,
  videoType,
  imageType,
  getYMDHMS
}
